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   源码介绍

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现在用微信公共平台的比较多，特封装一个微信的API类，方便调用。支持最新版4.5的5种推送消息类型和3种回复消息类型。对基本的请求验证和通过验证，接受消息和回复消息都有静态方法实现，不用再手工去做了。

using System;
using System.Collections.Generic;
using System.Xml;

namespace WeiXinAPI
{
    public class NewsReplyMessage : Message
    {
        public List<Article> Articles;

        public NewsReplyMessage()
        {
            MsgType = MessageType.News;
            Direction = MessageDirection.Reply;
            FuncFlag = "1";
        }

        public int ArticleCount
        {
            get { return Articles == null ? 0 : Articles.Count; }
        }

        public string FuncFlag { get; set; }

        public override bool Parse(string xmlMessageString)
        {
            //空消息
            if (string.IsNullOrEmpty(xmlMessageString))
            {
                return false;
            }
            //获取消息内容
            try
            {
                var xmlDocument = new XmlDocument();
                xmlDocument.LoadXml(xmlMessageString);
                XmlNode firstNode = xmlDocument.FirstChild;
                if (firstNode != null)
                {
                    //消息类型
                    XmlNode tempNode = firstNode.SelectSingleNode("MsgType");
                    if (tempNode == null) return false;
                    MsgType = tempNode.InnerText;
                    //发送者
                    tempNode = firstNode.SelectSingleNode("FromUserName");
                    if (tempNode == null) return false;
                    FromUserName = tempNode.InnerText;
                    //接收者
                    tempNode = firstNode.SelectSingleNode("ToUserName");
                    if (tempNode == null) return false;
                    ToUserName = tempNode.InnerText;
                    //创建时间
                    tempNode = firstNode.SelectSingleNode("CreateTime");
                    if (tempNode == null) return false;
                    CreateTime = Convert.ToInt64(tempNode.InnerText);

                    //Articles
                    tempNode = firstNode.SelectSingleNode("Articles");
                    if (tempNode != null)
                    {
                        if (tempNode.HasChildNodes)
                        {
                            Articles = new List<Article>();
                            foreach (XmlNode xmlNode in tempNode.ChildNodes)
                            {
                                XmlNode tmpNode = xmlNode.SelectSingleNode("Title");
                                if (tmpNode == null) return false;
                                string title = tempNode.InnerText;
                                tmpNode = xmlNode.SelectSingleNode("Discription");
                                if (tmpNode == null) return false;
                                string description = tempNode.InnerText;
                                tmpNode = xmlNode.SelectSingleNode("PicUrl");
                                if (tmpNode == null) return false;
                                string picUrl = tempNode.InnerText;
                                tmpNode = xmlNode.SelectSingleNode("Url");
                                if (tmpNode == null) return false;
                                string url = tempNode.InnerText;
                                Articles.Add(new Article(title, description, picUrl, url));
                            }
                        }
                    }

                    //星标(FuncFlag=1时星标消息)
                    tempNode = firstNode.SelectSingleNode("FuncFlag");
                    if (tempNode == null) return false;
                    FuncFlag = tempNode.InnerText;

                    return true;
                }
                return false;
            }
            catch
            {
                return false;
            }
        }

        public override string ToString()
        {
            string result = string.Format("<xml>"   Environment.NewLine  
                                          "<ToUserName><![CDATA[{0}]]></ToUserName>"   Environment.NewLine  
                                          "<FromUserName><![CDATA[{1}]]></FromUserName>"   Environment.NewLine  
                                          "<CreateTime>{2}</CreateTime>"   Environment.NewLine  
                                          "<MsgType><![CDATA[{3}]]></MsgType>"   Environment.NewLine  
                                          "<ArticleCount>{4}</ArticleCount>"   Environment.NewLine, ToUserName,
                                          FromUserName, CreateTime, MsgType, ArticleCount);
            if (Articles.Count > 0)
            {
                result  = "<Articles>"   Environment.NewLine;
                foreach (Article article in Articles)
                {
                    result  = "<item>"   Environment.NewLine
                                "<Title><![CDATA["   article.Title   "]]></Title>"   Environment.NewLine
                                "<Discription><![CDATA["   article.Description   "]]></Discription>"  
                              Environment.NewLine
                                "<PicUrl><![CDATA["   article.PicUrl   "]]></PicUrl>"   Environment.NewLine
                                "<Url><![CDATA["   article.Url   "]]></Url>"   Environment.NewLine
                                "</item>"   Environment.NewLine;
                }
                result  = "</Articles>"   Environment.NewLine;
            }
            result  = "<FuncFlag>"   FuncFlag   "</FuncFlag>"   Environment.NewLine   "</xml>";
            return result;
        }
    }
}